Nailing-machine



(No Model.) 2 Sheets-Sheet l'. L GODDU A NAILING MACHINE.

Patented Nov. 18, 1890.v

Ewevfof Lala/2S OCZCZZU NAILING MACHINE.

PatentedA Nov. 18, 1890.

' UNITED 'STATES PATENT OFFICE,"

LOUIS GODDU, OF IVINCHESTER, ASSIGNOR TO JAMES IV. BROOKS, PRINCIPAL TRUSTEE, OF CAMBRIDGE, AND FRANK F. STANLEY, ASSOCIATE TRUSTEE,

OF SIVAMPSCOTT, MASSACHUSETTS.

NAlLlNG-IVACHINE.

SPECIFICATION forming part of Letters Patent No. 440,805, dated November 18, 1890.

Application filed January 21, 1890- Selial No. 337,595. (No model.)

.To all whom, t may concern:

Be it known that LLOUIS GODDU, of Winchester, county of Middlesex, State of Massachusetts, have invented an Improvement in Screw-Inserting Machines, of which the following description, in connection With the accompanying drawings, is a specification, like letters on the drawings representing like parts.

1ol This invention is intended as an improvement upon that class of machine represented in United States Patent No. 171,610, dated December 28, 187 5, the said machine being adapted to insert a screw-threaded wire into z 5 a sole or stock, as it is called, held between a nose at the lower end of a rising and falling head and the top of ahorn, the said head and horn having an oscillating motion about a vertical pivot to effect the feeding of the zo material.

In the machine described in the patent referred to the head is automatically lifted a defined distance above the surface of the stock after the wire has been inserted andthe 2 5 shoe fed and the wire cut off, the head being lifted from the stock and moved laterally back to its starting-point, ready to again descend upon the stock on the horn prior to inserting a second fastening, and so on. The

3o lifting of the head in the machine described in the said patent is accomplished through a cam on the main shaft of the machine supported in the said head, the said cam acting upon a lever pivoted at its inner end on the 3 5 head, the opposite end of the said lever being attached by a connecting-rod to a movable carrier or yoke provided with pivoted clamping-blocks, which blocks co-operate with a fixed vertically-placed pin located on the post 4o of the machine, The carrier or yoke referred to receives through its inner end a rod which is connected to the head, the said rod having a shoulder near its lower end to act against the upper side of the said yoke, a spring surrounding the lower end of the said rod acting against the under side of the said yoke, so that whenever the head descends the shoulder on the said rod acts upon the yoke and keeps it in substantially horizontal position, so that the clamps of the yoke may move freely in a 5o vertical direction on the said pin; butwhenever the head was to be lifted the cam on the shaft referred to, by acting on the lever, also before referred to, moved the link and tipped the yoke out of horizontal position, thus caus- 5 5 ing the blocks to tightly clamp the said pin. After the blocks were moved to clamp the said pin, the said cam in its further rotation acted against the said lever, the outer end of which then rested upon the link or connect- 6o ing-rod held rigidly, thus causing the head to rise from the stock. This mechanism, fully described in the patent referred to, has in practice been found at times not to operate properly because of -failure of the clamps to properly hold fast upon the pin, and in such event the head fails to be lifted sufficiently to properly release the stock and enable the head to be swung back into its normal or starting position. 7o

The object of this present invention is to provide means by which to positively lift the head, as will be hereinafter described, and control the pawl, which receives the weight of the head when being lifted.

My invention consists in a screw-inserting machine containing the following inst-rumen- `talitiesviz., a vertically and laterally movable head, a shaft therein having a cam, a lever actuated thereby, a connecting-rod and pawl- 8o carrying slide having a pawl D3, and a ratchettoothed plate adapted to be engaged by the said pawl, and a cast-off wedge and means to move said wedge to control the engagement of the said pawl with the said ratchet-toothed v plate, substantially as will be described.

Figure l is a left-hand side elevation of a sufficient portion of a nailing-machine embodyin g my invention to enable the same to be understood. Fig. 2 is a sectional detail to 9o the left of the line y, Fig. 1.

Referring to the drawings, the horn A, the head E, carrying the usual spindle D, having suitable wire-feeding rolls I-I at its lower end, the cam or main shaft I, having a Wormwheel G2, the lever V, and the means for rotating the said main shaft are and may be all as in the patent referred to. The spindle D will be actuated as in the said patent from a frictionpulley x2, fully described therein, and under the control of a treadle R.

In this my present invention the parts added to the machine before referred to derive their motion from a cam B, which occupies the position on the said shaft which is occupied by a cam marked V3 in the said patent, the cam B having, however, a dierently-shaped cam-groove and having a peripheral throw, the point of which commences at x2 and ends at x3.

The column C of the machine has a lug C', which receives a stand C2, having an attached ratchet-toothed plate C3, the said stand also having suitable openings or bearings for a pawl-carrying slide D2, it having a pawl D3,

which is acted upon by a pin D4, which is normally pressed outwardly by a spring D5, herein shown as made adjustable in the said pawl-carrying slide D2 by a suitable screw D6. The stand referred to has also suitable guideways to receive a controlling-bar E2, having an attached cast-off Wedge b, the said wedge being herein shown as attached to the said bar by a screw b', a rod extended from the upper end of the said bar and constituting part of it being jointed at b2 to a lever b3, pivoted on a pin b4, constituting the fulcrum for the lever V. The lever b3 has, as shown, a roller which is acted upon by the periphery of the cam B to depress and hold down the said bar and cast-off wedge during a little more than one-half a rotation of the cam B.

The pawl-carrying slide D2 is joined by a link or connecting-rod d with a block d2, pivoted upon the outer end of the lever V, the connection4 of the said block with the said lever being preferably made adjustable, the said lever V having a roller or other stud, as cl3, to enter the cam-groove d4, cut in one side of the cam B, the shape'of the said groove being fully shown in the drawings. This rod d is preferably made adjustable as to its length so as to compensate for wear of the parts, the

' adjustment of the rod d toward and from the fnlcrum of the lever V regulating the extent of rising and falling movement of the head. The extremity of `the said rod is preferably made spherical, as represented in Fig. 2, at the lower end of the said rod. The pawl-carrying slide has a projection or ear c2, upon which rests the lower-end of a spiral spring e3, the uppei end of the said spiral spring acting pon an adjustable collar e4 to normally keep the roll of thearm b3 against the periphery of the cam B.

`Referring to the drawings, especially Fig. 2, the parts are shown in the position they will occupy while the spindle is being rotated to insert one end of the screw-wire into the stock and the head and horn are being swung with the shoe to feed the same with relation to the usual gage f, which is fixed upon the column, and against which the operator presses the edge of the sole, and in Fig. 2 it will be noticed that the pawl Dgis acted upon by the castoff wedge, and therefore the pawl does not then engage a tooth of the fixed ratchet-plate C3. This pawl is kept out of engagement with the teeth of the said ratchet-plate until the head has received its feeding movement and is in position to be lifted from the stock, at which time the heel w3 of the cam B passes beyond the roll of the arm b3, so that the bar E2 rises and carries the cast-off wedge above the lower end of the pawl D3, so that the said pawl engages one of the teeth of the ratchetplate C3. The engagement of the pawl with the ratchet-plate having been effected, the cam B in its further rotation, by acting upon the roll d3 of the lever V, causes the head E to be elevated, as provided for in the patent referred to, it being obvious that the said head must at such time be lifted by the Vcam B in its rotation, for the pawl-carrying slide is fixed and cannot descend, so the head must rise. This lifting of the head from the stock puts the head in condition to be swung around, as provided for in the said patent, to its starting-point, the operator at such time holding the edge of the shoe against the gage referred to, so that the horn of the usual nose of the machine travels backward over the shoe. As soon as the head arrives at its startingpoint, the cam B in its further rotation, owing to the shape of the groove therein, permits the head to descend and the usual nose to rest upon the surface of the stock, and just at this time a slight further movement of the cam, acting upon the roller or other stud d3, lifts the lever V and the connecting-rod and pawl-carrying slide just enough to unseat the pawl D from the ratchet-tooth then engaged by it, and at the same time, or immediately thereafter, the point :n2 of the throw portion of the cam B strikes the roll on the arm b3, thus depressing the bar E, causing the castoff wedge to act against the pawl D and keep it out of engagement with the said ratchetplate, the said wedge continuing to hold the said pawl out of engagement with the teeth of the said ratchet-plate until the head is to be again lifted, when the pawl will be again engaged with the ratchet plate, as before stated.

The pawl in operation engages one or the other of the teeth of the ratchet-plate, according to the thickness of the stock, and the fulcrum-pin b4 for the levers b3 and V rises and falls with the head, so that the head is lifted always a certain distance'from the stock on the horn, no matter what its thickness, and the head is always adapted to act upon stock of any varying thickness. The outward movement of the pawl D3, after the same has been unseated from the ratchet-teeth of the plate, as described, by the cast-0E wedge, prevents the breaking of the said teeth. and the said cast-olf wedge, when acting against the said pawl, also holds it so that the operator with his foot on the treadle R may raise and lower the head in order to enable him to put a shoe upon the horn or remove a shoe from the horn IOO IIO

and laterally movable head, a shaft therein having a cam, a lever actuated thereby, a connectingrod, a pawl-carrying slide having a pawl D3, a ratchet-toothed plate adapted to be engaged by the said pawl, and a cast-off wedge and means to move it to control the engagement of the said pawl with the said ratchettoothed plate, substantially as described.

In testimony whereof have signed my name to this specication in the presence of two subscribing witnesses.

LOUIS GODDU. Witnesses'.

GEo. W. GREGORY, EMMA J. BENNETT. 

